The North American species of Pholiota, by Alexander H. Smith and L. R. Hesler.

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The North American Species of Pholiota

broad, close, adnexed, edges even and pallid to concolor with faces.
Stipe 4-8 cm long, 1-2 cm thick, equal to a flanged base, yellowish
within, apex yellowish and silky fibrillose, lower down with distinct
tawny appressed fibrillose scales and entire base showing ochraceous
tawny or darker in age; annulus subpersistent, heavy, thick and fibrillose
in texture, with tawny patches on under side similar to scales on pileus
or their outlines not as clear, gelatinous, often broken as cap expands and
remains clinging to pileus margin.
Spore deposit dull rusty brown; spores 6-7.5 (8) x 3.8-4.2 ft, smooth,
apical pore minute; shape in face view mostly elliptic varying to slightly
ovate, in profile mostly elliptic to obscurely bean-shaped; color in KOH
dull cinnamon, in Melzer's sol. slightly paler; wall about 0.25 /u thick.
Basidia 26-32 x 5-7.5 pt, clavate, 4-spored, hyaline to yellowish in
KOH, content orange-buff in Melzer's sol. Pleurocystidia 25-40 x 6-13 p,
narrowly clavate-mucronate to broadly so and with a long pedicel, content like that of chrysocystidia to merely reticulate (in KOH) and hyaline
to rusty brown, in Melzer's reagent the content brownish to hyaline.
Cheilocystidia 18-32 x 5-11,u, clavate to ventricose or fusoid-ventricose,
some rather irregular in outline, content ochraceous in KOH, walls thin
or very slightly thickened near base. Caulocystidia 30-65 x 5-11 lu, rarely
30-40 x 9-13 pL, abundant, narrowly clavate, hyaline to weakly yellowish
in KOH, roughened by adhering small plates (readily visible as thickened areas in optical section).
Gill trama of parallel hypha 6-15 p, wide and with long cells having
hyaline to yellowish walls in KOH, the walls thin for the most part;
subhymenium not gelatinous in young to freshly matured specimens and
only slightly so in age, of hyphae 2-3,t diam. and closely interwoven.
Pileus cutis a gelatinous pellicle of hyphae 3-6,p diam., hyaline to yellowish in KOH, the walls finally disintegrating, hypodermium of inflated
non-gelatinous hyphae 10-25,u diam., hyaline to brownish in KOH,
content of some dull orange in Melzer's sol. Clamp connections present.
HABIT, HABITAT, AND DISTRIBUTION: Caespitose on a Douglas fir (Pseudotsuga) log, Newport, Wash. Sept. 23, 1966, coll. Kenneth Harrison.
(Smith 73615), description taken from this collection.
OBSERVATIONS: We have used the Friesian name for this species because his fungus is described as growing on conifer wood and has floccoseradiate annulus and concentric scales on the pileus. P. abietis differs in
having pallid brownish gills when young, in lacking an annulus, and in
having a truly gelatinous subhymenium. P. fallax has yellow marginate
gills and glutinous gelatinous scales on the stipe. Both this species and
P. aurivella attain exceptionally large size in the Pacific Northwest. To
this extent our material does not fit the Friesian concept.
115. Pholiota adiposa (Fr.) Kummer, Der Fuhrer in die Pilzkunde,
p. 83. 1871.
Agaricus adiposus Fries, Syst. Myc. 1: 242. 1821.